Incandescent electric lamp



( NO Model.)

R. H. s. THOMPSON; ING ANDESG'ENT ELECTRIC LAMP.

' No. 280,331. Patented June 26, 1883.

mines; flz.fl v $4M ra M flu/en for g m x4 PATENT OFFICE.

RICHARD H.,s. THOMPSON,

or LEXINGTON, AssIGNoHOF ONE-HALF To PHILIP B. THOMPSON, JR.,'. orHARRODSBURQIKENTUOKY.

INCAN'DESCENT ELECTRIC LAMP.

s'rncri rcs'rron forming part of Letters Patent1Io. 280,8 37, dated Juneas. 1583.

Application filed March 14,1883. (No'modeL) Ia aM-whom it "my concern.-Be it known that I, RICHARD S. I song-a citizen -of the United States,residing at Lexington,-. in the county of Fayette and State 5- ofKentucky, have invented a 'new'and useful lncandescentElectric Light,'of whichthe'following is a specification. v

Myinventio'n relatesto improvements in in candescent electric lights,whether inclosed in .10 a vacuum or not, andthe objects of myimprovement are, first, to provide a means of regulating the light,increasing or diminish- 1 'ing it without changing its character;second,

to save electricity in' proportion to the diminution of the light; and,third, when-the light is in vacuo, to have the mechanical movementswhich accomplish the above result also in the vacuum and their controloutside.

.taiu these objects by mechanism equivalent to thatsillustrated in theaccompanying drawingsiin which;-, p g I Figure 1 is a view of the lampready to be. placed in its' stand, Fig. 2 is a vertical section ofthe-stand; and Fig. 3, a side viewof the incandescent strip or loop, oneof the. electrodes, and the ratchet-bar. Fig. 4 isa view of the switchwhen turned to theiright and the connections then made; Fig. 5,'a viewofthe same when turned to the jleit, and'liig, 6 a

'crossrsection of switch.

Similarletters refer tosimilar parts through- .Out the several views.The incandescent loop A, the electrodes B, the mtchet-b ar C, supportingthe non-con- 5' ducting strip 1:, to which the incandescent 1 loop-A isattached, andthe eleetromotor 1), constitute the working part of thelamp proper.

The frame E, the binding-screws a a, the contact springs b b 'b, and-therotating switch 0 d, together with theconductorse e, constitute thestand. or receptacle for the lamp. .The

' cock h serves to turn the switch d.

Upon the lower part of the stem of the globe containingthe light arethree metal rings,

f l lf 'f, of which f and f are connected with e two electrodes'B andB".byconductingwires,.-which are sealed ..'in the glass; The'thirdring,"f', is connected by anotherwire,

also sealed inthe glass, with one of the brushes, 9, of t the commutator:of the electroihotonf Whenthe lamp'is placed'in' the socket of the gstand, the'three ringsf THQM1?-.

':f come n cont-act 'with the springs b b b and'form a circuit for theelectric current. The electrodes B B are formed of springbrass orlothersuitable'material, and a'rebent in such' a, shape as'to form goodcontact with each side of each arm of the incandescent loop.A. I p

With the switch (Z'in the position shown in Fig. 2, the current,entering through thebind= dug-post a, passes directly, by way of thecon:

ductor e, the spring b, the ring f to the electrode B, thence throughthe loop A to the electrode B, 'aud'by way of the spring b andconductor-e to the binding-post -'a andthence to its source; SVheu theswitch dis turned to the-right by means of the cock h, the current,entering as before, and passing through e, divides, one, portion passingto "the spring b, 7o 'thence tot-he brush of the commutator oppo--. site9', (the one shownin the drawings, Fig. 1,) thence-through the wireofthe rotating arrna tnre" to the bru'shg, which has. metallic con-I'nection with the electrode B, at 'which point the divided currentreunites and' passes through the electrode 13, the loop A, through theelec- 'trode'B, and tlrence bywayof the ringf, the spring b, and theconductor e to; the hind .i'ng -.post a, and thence to its source. I Thepassage of thecurrent around the armature causes it to rotate,-and'bymeans of the pinion- .wheel tp-and the ratchet-bar Othe incandes Gentloop A is drawn down 'betweenthe lips 'of the electrodes B and B, thusdiminishing the amount of the incandescent surface as nuch as maybe'desired,-'whe1 1.the co'ck is'turned so. as to bring the switch inthe position shownin the drawings, Rig. 2.! When it is desired toincrease the light again, the switch. iSjJillllBd. to the left, inwhichthe current, entering asbefore, passes frorn the conductor e to thespring b, thence'tothe electrode B, through the loop- A andthe'electrode Bto its base, where 'it divides, one portion passing tothe brush'g, thence around the armature to the brush'g and itsconnection to spring b and-f the conductor'ia, where it reunites withthe other port tion,'whichhas passed from the electrode B to the; ring fand the, springb to thezsameconductor, whence the reunited'currentpasses out 'bythe-binding-post a to its source. This re;

veieal of the direction of the-current ereund the armatme causes it torevolve in the ogposite directiqn to the 'i'ormer; ca'ee; raising theincandescent Map; A through the lipe of the s eleetrbde's ae war as maybe desired, when the cock is tufned so as to bring the switeh in thepositibn shown 'in Fig.

It i'sevidentthat varieeemeens maybe adopt ifja s biexleidis'usedasthe'motor, no eliange i8 151mm; It is al a evident that whenmere meehameal means amused-for moving the reteheHear a y or flown, ofthe I eieetmmetor', ell itsjoennecti'on's outside theetem of the globe2o musftbe preperly SeaIeeL-eo as te' peeeerye the vaeim-m in'the globe'W'h'at I claim asmy invention, endvde'sire to aware by Lett rs mane,"it;

'1'. The cmiibmatieln in" an; incmfiescent 25 lamp tif eleetrofiesheving-geefi but ings 011 contact with eech-side of the inwndescentstrip or 1o0jp,jwith suitable mechanifim for changing the pointsoieontmtlbetween the electrodes and the strip or 10012 A, snbsten'w tiallyas and for the purpoeefieeeribefi, e 2. The combinetien, in aninee-nfieeeent lamp; of springeieeti ndes whose Rips mm tact with eachside of the inee-neeeent etaip or 100;) A, withe ratchet-8m '01 lent,and an electrometer for meiring eaiii, 5 eaqdesee'nt stripup anti downbetween the iipg I of the electrodes B and B, substantially as and forthe purpose set forth! 3.. The combination, i

21.; anineende'seenttrodes bearing upon e'eidieopfor strip, findfliikuelectrognotor for moving said electrbd es, with a switeh and suitableeennections; whereby the eurrentmey be sent through the-leap or; strip,01' through'both the Keep e1 'eti'ip and- 5 the motor, substantieilyasdescribw." t

4 RIOHA'RDH; Sq THOM$OBL Witnesses: v

- P IL; B. Tmmeeei J12,

' Tnos. G. INGRAM.

-- lamp of the1oep-0r strip,'the-mevaigle eiee- 4Q

